An airplane bathroom is a crude and scary place. There is a sink that dispenses water of questionable potability. And the powerful vacuum toilet has the potential to crush human bones. (So it appears.) Therefore, its usage calls for some civility. To make the experience better for everyone, let's heed a set of simple, easy-to-follow behavioral guidelines. Here are seven rules for using the airplane bathroom with grace and courtesy.

What are your bathroom-behavior tips for fellow passengers? Share your thoughts in the comments!